Here are a few additional images of the JEOL Common Specimen Holder (EM-21010 SCSH). This is the rod that inserts into the column of both the JEOL JEM 1400plus and the JEOL JEM 3200FS. Various grid-holding "retainers" can be attached to such rods using a spring-based clamping mechanism, allowing the retainers to we switched in only a minute or two.